The Danes were forced to retreat after a surprise attack on the Danish camp by Henry II, Count of Holstein-Rendsburg.

[2] On Zealand, the castle of Søborg and Kalundborg was mortgaged to Ingeborg of Norway, and these would be the first targets for Valdemar.

[5] In his camp, he made an alliance with the Wendish cities on 15 July, in which they received renewed ratification on their free letters, for helping Valdemar with warships during his siege.

[4] However, without a declaration of war, Henry II, Count of Holstein-Rendsburg showed up at Kalundborg with many warships and fell over Valdemar's vessels, which either deserted the action or were enclosed.

[6][7] On 1 September, an agreement was made between the two parties, in which four men from each side would meet at Roskilde on Michaelmas to settle the feud between Ingeborg and Valdemar.